diff --git a/src/meshgenerator.cpp b/src/meshgenerator.cpp
index e495d34c..a01479fc 100644
--- a/src/meshgenerator.cpp
+++ b/src/meshgenerator.cpp
@@ -181,6 +181,24 @@ void MeshGenerator::process()
         meshlite_bmesh_add_edge(meshliteContext, bmeshId, bmeshFromNodeId, bmeshToNodeId);
     }
     
+    for (const auto &nodeIt: m_snapshot->nodes) {
+        QString partId = valueOfKeyInMapOrEmpty(nodeIt.second, "partId");
+        const auto partBmeshIt = partBmeshMap.find(partId);
+        if (partBmeshIt == partBmeshMap.end())
+            continue;
+        const auto nodeBmeshIt = bmeshNodeMap.find(nodeIt.first);
+        if (nodeBmeshIt != bmeshNodeMap.end())
+            continue;
+        int bmeshId = partBmeshIt->second;
+        float radius = valueOfKeyInMapOrEmpty(nodeIt.second, "radius").toFloat() / longHeight;
+        float x = (valueOfKeyInMapOrEmpty(nodeIt.second, "x").toFloat() - mainProfileMiddleX) / longHeight;
+        float y = (valueOfKeyInMapOrEmpty(nodeIt.second, "y").toFloat() - mainProfileMiddleY) / longHeight;
+        float z = (valueOfKeyInMapOrEmpty(nodeIt.second, "z").toFloat() - sideProfileMiddleX) / longHeight;
+        int bmeshNodeId = meshlite_bmesh_add_node(meshliteContext, bmeshId, x, y, z, radius);
+        qDebug() << "bmeshId[" << bmeshId << "] add lonely node[" << bmeshNodeId << "]" << radius << x << y << z;
+        bmeshNodeMap[nodeIt.first] = bmeshNodeId;
+    }
+    
     std::map<QString, int> partMeshMap;
     std::vector<int> meshIds;
     for (const auto &partIdIt: m_snapshot->partIdList) {
diff --git a/src/skeletondocumentwindow.cpp b/src/skeletondocumentwindow.cpp
index 7ab3d60e..4bafbd60 100644
--- a/src/skeletondocumentwindow.cpp
+++ b/src/skeletondocumentwindow.cpp
@@ -194,6 +194,7 @@ SkeletonDocumentWindow::SkeletonDocumentWindow() :
     connect(graphicsWidget, &SkeletonGraphicsWidget::undo, m_document, &SkeletonDocument::undo);
     connect(graphicsWidget, &SkeletonGraphicsWidget::redo, m_document, &SkeletonDocument::redo);
     connect(graphicsWidget, &SkeletonGraphicsWidget::paste, m_document, &SkeletonDocument::paste);
+    connect(graphicsWidget, &SkeletonGraphicsWidget::changeTurnaround, this, &SkeletonDocumentWindow::changeTurnaround);
     
     connect(m_document, &SkeletonDocument::nodeAdded, graphicsWidget, &SkeletonGraphicsWidget::nodeAdded);
     connect(m_document, &SkeletonDocument::nodeRemoved, graphicsWidget, &SkeletonGraphicsWidget::nodeRemoved);
diff --git a/src/skeletongraphicswidget.cpp b/src/skeletongraphicswidget.cpp
index 2e89272a..ac789e6e 100644
--- a/src/skeletongraphicswidget.cpp
+++ b/src/skeletongraphicswidget.cpp
@@ -92,12 +92,12 @@ void SkeletonGraphicsWidget::showContextMenu(const QPoint &pos)
     
     QAction cutAction("Cut", this);
     connect(&cutAction, &QAction::triggered, this, &SkeletonGraphicsWidget::cut);
-    cutAction.setEnabled(!nodeItemMap.empty());
+    cutAction.setEnabled(!m_rangeSelectionSet.empty());
     contextMenu.addAction(&cutAction);
     
     QAction copyAction("Copy", this);
     connect(&copyAction, &QAction::triggered, this, &SkeletonGraphicsWidget::copy);
-    copyAction.setEnabled(!nodeItemMap.empty());
+    copyAction.setEnabled(!m_rangeSelectionSet.empty());
     contextMenu.addAction(&copyAction);
     
     QAction pasteAction("Paste", this);
@@ -120,6 +120,26 @@ void SkeletonGraphicsWidget::showContextMenu(const QPoint &pos)
     connect(&unselectAllAction, &QAction::triggered, this, &SkeletonGraphicsWidget::unselectAll);
     unselectAllAction.setEnabled(!m_rangeSelectionSet.empty());
     contextMenu.addAction(&unselectAllAction);
+    
+    contextMenu.addSeparator();
+    
+    QAction addMirrorAction("Mirror", this);
+    connect(&addMirrorAction, &QAction::triggered, this, &SkeletonGraphicsWidget::addMirror);
+    addMirrorAction.setEnabled(readSkeletonNodeAndAnyEdgeOfNodeFromRangeSelection(nullptr, nullptr));
+    contextMenu.addAction(&addMirrorAction);
+    
+    QAction deleteMirrorAction("Delete Mirror", this);
+    connect(&deleteMirrorAction, &QAction::triggered, this, &SkeletonGraphicsWidget::deleteMirror);
+    deleteMirrorAction.setEnabled(readSkeletonNodeAndAnyEdgeOfNodeFromRangeSelection(nullptr, nullptr));
+    contextMenu.addAction(&deleteMirrorAction);
+    
+    contextMenu.addSeparator();
+    
+    QAction changeTurnaroundAction("Change Turnaround..", this);
+    connect(&changeTurnaroundAction, &QAction::triggered, [=]() {
+        emit changeTurnaround();
+    });
+    contextMenu.addAction(&changeTurnaroundAction);
 
     contextMenu.exec(mapToGlobal(pos));
 }
@@ -589,6 +609,10 @@ QPointF SkeletonGraphicsWidget::scenePosFromUnified(QPointF pos)
 
 bool SkeletonGraphicsWidget::mouseDoubleClick(QMouseEvent *event)
 {
+    if (m_hoveredNodeItem || m_hoveredEdgeItem) {
+        selectPartAll();
+        return true;
+    }
     return false;
 }
 
@@ -947,6 +971,35 @@ void SkeletonGraphicsWidget::readSkeletonNodeAndEdgeIdSetFromRangeSelection(std:
     }
 }
 
+bool SkeletonGraphicsWidget::readSkeletonNodeAndAnyEdgeOfNodeFromRangeSelection(SkeletonGraphicsNodeItem **nodeItem, SkeletonGraphicsEdgeItem **edgeItem)
+{
+    SkeletonGraphicsNodeItem *choosenNodeItem = nullptr;
+    SkeletonGraphicsEdgeItem *choosenEdgeItem = nullptr;
+    for (const auto &it: m_rangeSelectionSet) {
+        QGraphicsItem *item = it;
+        if (item->data(0) == "node") {
+            choosenNodeItem = (SkeletonGraphicsNodeItem *)item;
+        } else if (item->data(0) == "edge") {
+            choosenEdgeItem = (SkeletonGraphicsEdgeItem *)item;
+        }
+        if (choosenNodeItem && choosenEdgeItem)
+            break;
+    }
+    if (!choosenNodeItem || !choosenEdgeItem)
+        return false;
+    if (choosenNodeItem->profile() != choosenEdgeItem->profile())
+        return false;
+    if (choosenNodeItem != choosenEdgeItem->firstItem() && choosenNodeItem != choosenEdgeItem->secondItem())
+        return false;
+    if (nodeItem)
+        *nodeItem = choosenNodeItem;
+    if (edgeItem)
+        *edgeItem = choosenEdgeItem;
+    if (m_rangeSelectionSet.size() != 2)
+        return false;
+    return true;
+}
+
 void SkeletonGraphicsWidget::selectPartAll()
 {
     unselectAll();
@@ -1041,4 +1094,3 @@ void SkeletonGraphicsWidget::copy()
     QClipboard *clipboard = QApplication::clipboard();
     clipboard->setText(snapshotXml);
 }
-
diff --git a/src/skeletongraphicswidget.h b/src/skeletongraphicswidget.h
index 783042d1..bddca0a3 100644
--- a/src/skeletongraphicswidget.h
+++ b/src/skeletongraphicswidget.h
@@ -263,6 +263,9 @@ signals:
     void undo();
     void redo();
     void paste();
+    void changeTurnaround();
+    void addMirror();
+    void deleteMirror();
 public:
     SkeletonGraphicsWidget(const SkeletonDocument *document);
     std::map<QUuid, std::pair<SkeletonGraphicsNodeItem *, SkeletonGraphicsNodeItem *>> nodeItemMap;
@@ -277,6 +280,7 @@ public:
     static SkeletonProfile readSkeletonItemProfile(QGraphicsItem *item);
     void readMergedSkeletonNodeSetFromRangeSelection(std::set<SkeletonGraphicsNodeItem *> *nodeItemSet);
     void readSkeletonNodeAndEdgeIdSetFromRangeSelection(std::set<QUuid> *nodeIdSet, std::set<QUuid> *edgeIdSet);
+    bool readSkeletonNodeAndAnyEdgeOfNodeFromRangeSelection(SkeletonGraphicsNodeItem **nodeItem, SkeletonGraphicsEdgeItem **edgeItem);
 protected:
     void mouseMoveEvent(QMouseEvent *event);
     void wheelEvent(QWheelEvent *event);
diff --git a/src/skeletonpartlistwidget.cpp b/src/skeletonpartlistwidget.cpp
index daeca252..adb2740e 100644
--- a/src/skeletonpartlistwidget.cpp
+++ b/src/skeletonpartlistwidget.cpp
@@ -25,7 +25,6 @@ SkeletonPartWidget::SkeletonPartWidget(const SkeletonDocument *document, QUuid p
     QHBoxLayout *miniToolLayout = new QHBoxLayout;
     miniToolLayout->setSpacing(0);
     miniToolLayout->setContentsMargins(0, 0, 0, 0);
-    miniToolLayout->addSpacing(5);
     miniToolLayout->addWidget(m_visibleButton);
     miniToolLayout->addWidget(m_lockButton);
     miniToolLayout->addWidget(m_subdivButton);